Hydraulic engine and pump



PATENTED FEB. 16, 1904.

' 0,.H. PAGBTT, HYDRAULIC ENGINB AND PUMP. APPLIOATION FILED AUG. 18, 1902.

N0 MODEL.

Wi'l essczs 15% for. %M2*' by UNITED STATES Patented February 16, 1904.

OHARLES H. PAGETT, OF LAFAYETTE, INDIANA.

HYDRAULIC ENGINE AND PUMP.

SPECIFICATION forming part of Letters Patent No. 752,098, dated February 16, 1904.

Application filed August 18, 1902- To all whom it may concern:

Be it known that I, CHARLES H. PAGETT, a citizen of the United States, residing at Lafayette, in the county of Tippecanoe and State of Indiana, have invented a new and useful Hydraulic Engine and Pump, of which the following is a specification.

This invention relates to that class of devices in which the pressure furnished by the water systems of cities and towns is utilized for the purpose of operating a pump. The end in view may vary. Sometimes the initial city pressure is not sufficient to force the water to the upper stories of tall buildings, and in such a case the improved device will furnish an additional or auxiliary pressure whereby the water may be elevated to the requisite height. Again, it happens that the water furnished by the water systems of cities is unfit or undesirable for certain purposes, and in such cases the invention furnishes a means whereby the water from cisterns, wells, or other sources of supply may be forced into the service-pipes, the motive power for so doing being furnished by the pressure of the city water system.

Numerous devices have been constructed having the same ends in view; but many of them have been objectionable in some way, which has prevented their general introduction and use.

Now the object of this invention is to provide a device of this class which shall possess superior advantages in point of simplicity, durability, and general eificiency; and with these ends in view the invention consists in the improved construction, arrangement, and combination of parts, which will be hereinafter fully described, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a vertical sectional view of a device constructed in accordance with the invention. Fig. 2

is a plan view of the upper end of thepumpcylinder with the cap removed. Fig.3 is a vertical sectional View taken through the main and auxiliary valves of the hydraulic engine. Fig. 4 is a horizontal sectional View taken Fig.

through the cylinder and valve-chest.

Serial No. 120,091. (No model.)

5 is a detail view illustrating the means for connecting the piston with the piston-rod.

Corresponding parts in the several figures are indicated by similar numerals of reference.

1 designates the pumping-cylinder, and 2 the cylinder of the hydraulic engine or motor, the adjacent heads 3 and/i of said cylinders being connected by means of a frame 5,wher eby the pumping-cylinder is supported upon the motor-cylinder, as will be seen. Both of the cylinder-heads 3 and 4 are provided with packing-boxes 6 of ordinary construction for the passage of the piston-rod 7, which extends into both cylinders, as shown. The pistons of the two cylinders are constructed exactly alike, each being designated 8, each being composed of an anmilarly-grooved plate 9, having the central screw-threaded stem 10, upon which the cup-leathers 11 are disposed facing in opposite directions and spaced by an intermediate plate or disk 12.

13 is an annularly-grooved plate, which is termed the lock-nut, said plate being provided with a centrally-disposed screw-threaded perforation 14, whereby it engages the screw-threaded stem 10. Thus when the plate or lock-nut 13 is tightened upon the stem it engages directly the inner cup-leather 11, forcing it in an outward direction and compressing both cup-leathers between the intermediate plate 12 and the plates 9 and 13, and thus forming a perfectly-tight joint between the piston and the cylinder-walls.

The inner end of the stem 10 of each piston is provided with transverse grooves 15, adapted to receive and be engaged by L-shaped flanges 16, formed upon the adjacent'sides of the piston-couplings 17. These couplings are provided with annular disks or flanges 18 of slightly less diameter than the cylinders in which they operate. They are also provided with collars 19, recessed to receive the ends of the piston-rod 7, to which they are secured by means of set-screws 20.

From the construction just described it will be seen that the piston-coupling serves as a lock to prevent the plates or nuts 13 from being unscrewed from or disengaged from the pistons and that while it is a construction of extreme simplicity it possesses great advantages not only as regards its original construction, but of no little importance when necessary repairs have to be made.

The pumping-cylinder is provided at its upper end with a head 21, carrying an air-chamber 22,(of which only the extreme lower part is shown in the drawings.) The said head is connected on opposite sides thereof with the usual pipes 23 and 24 and check-valves 25 25 and 26 26. r

The requisite ports or passages have been shown in the drawings only in part, inasmuch as they involve nothing outside of ordinary pump construction.

The motor-cylinder 2 is provided on one side with flanges 28, to which the valve-chest 29 is suitably secured,as by means of stud-bolts 30. This valve-chamber is bored longitudinally at 31, 32, and 33, the bore 31 forming the main-valve chamber and the bore 32 forming the auxiliary-valve chamber, while the bore 33 furnishes a water-inlet by means of which the water under pressure for operating the motor is admitted. The bore 33 has a transverse branch 34, (shown in dotted lines in Fig. 4,) with which the supply-pipe may be conveniently connected. A transverse bore 35, extending through the chest to the mainvalve chamber 31, forms a discharge from the latter through which the spent water may pass to waste. The thickened orflanged portion of the motor-cylinder is provided with passages 36 and 37, connecting, respectively, the upper and lower ends of said motor-cylinder with the valve-chamber 31 near the center of the latter. Ports 38 and 39 connect the said valve-chamber at points not far from 7 its upper and lower ends with the source of supply, (indicated by The said main-valve chamber furthermore has an approximately centrally-disposed waste or exit port 40, the extension of which forms the bore 35.

The auxiliary-valve chamber is provided with a centrally-disposed water-supply port v 44, and passages 45 and 46 connect the said auxiliary-valve chamber with the upper and lower ends of the main-valve chamber 31, the ports of said passages being disposed within the auxiliary-valve chamber 32 at no great distance from the ends thereof. Ports 47 and 48 connect the ends of the anxiliary-valve chamber through suitably-disposed passages 49 with the center of the valve-chamber 31, where a port 50 is located. The latter port, it will thus be seen, is disposed at a point where it readily communicates with the main waste-port 40.

The main valve, which is located in the main-valvechamber 31, is composed simply of a stem 51, having four pistons disposed equidistantly thereon, said pistons being numbered 52, 53, 54, and 55, numbering from the upper end downward. The auxiliary valve,

arranged in the auxiliary-valve chamber 32, comprises a stem or body 56, provided at its upper and lower ends with pistons 57 and 58. The said valve is provided also with a stem 59, extending upwardly through a suitable opening in the upper head of the valve-chamber, which, as shown in the drawings, may consist of an ordinary screw-plug 60. Suitably connected to the upper end of the stem 59 is a laterally-extending bracket 61, having at its outer end a sleeve 62, in which a tappet-rod 63 is secured adjustably by means of a setscrew 64. This tappet-rod extends upwardly and downwardly through the upper head of the motor-cylinder and the lower head of the pump-cylinder, so as to be exposed to the action of the disks or flanges 18, which are connected, as already described, with the piston and heads which serve, as will be readily understood, to engage the said tappet-rod for the purpose of actuating the auxiliary valve.

The operation and advantages of this invention will be readily understood from the foregoing description, taken in connection with the drawings hereto annexed, by those skilled in the art to which the invention appertains. When the main and auxiliary valves occupy the position illustrated in Figs. 1 and 3, water will enter the auxiliary-valve chamber through the port- 44, and the auxiliary valve being disposed at the lower end of its stroke the water will flow through the lower passage 46 to the lower end of the main-valve chamber, exerting pressure against the lower end of the main valve, which is thus retained in an elevated position, as shown. When the main valve occupies this position, the two middle pistons 53 and 54 will connect the wasteport 40 through the passage 36 with the upper end of the motor-cylinder. The supply through the port 38 will be temporarily out oif by the pistons 52 and 53, and water will enter through the port 39 between the pistons 54 and 55 and pass thence through the passage 37 to the lower end of thepump-cylinder, exerting pressure in an upward direction upon the piston 8 therein. This being connected by the rod 7 with the pistons in the pumpcylinder, it follows that the movement of the two pistons is synchronous. When the upper limit of the stroke is reached, the lower end of the tappet-rod63 will be engaged and forced in an upward direction by the tappet-disk 18, connected with the piston in the motorcylinder, thereby shifting the position of the auxiliary valve to the upper end of its chamber. The water contained in the main-valve chamber below the valve finds an outlet through the passage 46 and port 48 to the lower end of the auxiliary-valve chamber, which is connected by the passage 49 with the waste-port in the main-valve chamber. At

the same time the pressure exerted by the water entering through the port 44 is exerted in a downward direction against the upper end of the main valve, thus shifting the latter to the lower end of its valve-chamber. The lower end of the motor-cylinder will now be connected by the passage 37 with the wasteport &0, which being centrally disposed is still included between the pistons 53 and 54. On the other hand, the water-supply through the port 39 will be cut off between the pistons 54 and 55, and the supply through the port 38 will, through the passage 36, enter the upper end of the motor-cylinder, exerting a downward pressure upon the piston therein until the completion of the stroke, when the position of the main and auxiliary valves is again reversed, owing to the engagement of the tapp'et-rod 63, this time with the tappet-disk 18, attached to the piston of the pump-cylinder. The operation will obviously continue until the water-supply is shut off.

I have in the foregoing described a very simple and in many respects preferable construction of my improved motor and pump; but I desire it to be understood that I do not limit myself to the structural details herein set forth, inasmuch as changes and modifications might be made without detracting from the utility of the device or departing from the spirit and scope of the invention. Conspicuous advantages gained by my present construction are to be found in the facts that the entire valve casing being detachable the ports and passages are easy of access and may be conveniently reached whenever necessary for cleansing or other purposes. An important structural advantage is also to be found in the connection with the piston-rod of the pistons operating the motor and pump cylinders, said connecting meansforming locking motor-cylinder, a reciprocating piston-rod,

pistons disposed in the two cylinders and each comprising a pair of plates of which one is provided with a grooved and threaded stem and the other with a threaded opening and screwing on said stem, a tappet-plate interlooking with the grooved portion of each of the stems and serving to prevent the separation of the plates, means for securing the piston-rod to the tappet-platesa valve, and a tappet-rod connected to the valve and adapted to be engaged by the tappet-plates.

2. The combination in a pumping mechanism of the class described, of a piston-rod, a piston comprising a plate having a threaded stem provided with transverse grooves at its upper end, cup-leathers and a spacing-disk mounted upon said stem, a second plate having a threaded opening mounted upon the stem and forming a nut for holding the cupleathers and disk in place, a tappet-disk having flanges engaging the grooves in the stem, and means for securing said tappet plate to the piston-rod.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

CHARLES H. PAGETT.

Witnesses:

CHAS. W. BANGS, FRANK PAGETT. 

